The FBI open up phrase comes from the familiar image of agents shouting a warning before a forced entry, and the clip version became a staple soundboard and meme sound in the 2010s. Short edits spread it across gaming, prank and reaction videos, where creators paired the shout with knocking, door kicks and exaggerated entrances. Its popularity comes from instant recognition: no setup is needed for viewers to understand a raid joke. It remains common in shorts and streams because the two second burst fits tight edits and punchlines.